Like pz.org, Platypus is a project and, as such, doesn't have a phone or a dedicated office.
For e-mail, please use the following address, (making the necessary changes)
platypus(@) pz[dot]org.

For comments or queries of general interest, consider using the Platypus mailing lists, so that all subscribers
can benefit from your comments, questions, and concerns. The various mailing lists can be accessed
here.